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0cbb58e046
This is a reland of 87a7b82520
Original change's description:
> Refactoring of the noise suppressor and adding true multichannel support
>
> This CL adds proper multichannel support to the noise suppressor.
> To accomplish that in a safe way, a full refactoring of the noise
> suppressor code has been done.
>
> Due to floating point precision, the changes made are not entirely
> bitexact. They are, however, very close to being bitexact.
>
> As a safety measure, the former noise suppressor code is preserved
> and a kill-switch is added to allow revering to the legacy noise
> suppressor in case issues arise.
>
> Bug: webrtc:10895, b/143344262
> Change-Id: I0b071011b23265ac12e6d4b3956499d122286657
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158407
> Commit-Queue: Per Åhgren <peah@webrtc.org>
> Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#29646}
Bug: webrtc:10895, b/143344262
Change-Id: I236f1e67bb0baa4e30908a4cf7a8a7bb55fbced3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158747
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Commit-Queue: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29663}
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
/*
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* Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_processing/ns/suppression_params.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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SuppressionParams::SuppressionParams(
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NsConfig::SuppressionLevel suppression_level) {
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switch (suppression_level) {
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case NsConfig::SuppressionLevel::k6dB:
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over_subtraction_factor = 1.f;
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// 6 dB attenuation.
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minimum_attenuating_gain = 0.5f;
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use_attenuation_adjustment = false;
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break;
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case NsConfig::SuppressionLevel::k12dB:
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over_subtraction_factor = 1.f;
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// 12 dB attenuation.
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minimum_attenuating_gain = 0.25f;
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use_attenuation_adjustment = true;
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break;
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case NsConfig::SuppressionLevel::k18dB:
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over_subtraction_factor = 1.1f;
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// 18 dB attenuation.
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minimum_attenuating_gain = 0.125f;
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use_attenuation_adjustment = true;
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break;
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case NsConfig::SuppressionLevel::k21dB:
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over_subtraction_factor = 1.25f;
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// 20.9 dB attenuation.
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minimum_attenuating_gain = 0.09f;
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use_attenuation_adjustment = true;
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break;
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default:
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RTC_NOTREACHED();
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}
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}
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} // namespace webrtc
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